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[ubuntu] Unable to install or update anything in 12.04

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linux-howto

http://ubuntuforums.org – Hi, recently I ran into a problem which seemed pretty similar to what's described in this post: How do I deal with "unauthenticated sources" errors in the Software Center? I was receiving this error message anyway- Requires installation of untrusted packages: The action would require the installation of packages from not authenticated sources. I had tried to download installations and updates from a variety of different sources, but all returned the same message. Likewise sudo apt-get update/upgrade/install failed. So I tried what was suggested in the above post: sudo (Hardware)